Evaporator.



No. 894,407. PATENTED JULY 28, 1908. T. SUZUKI.

EVAPORATOR.

APPLICATION FILED MAY 15, 1907.

%d7ae55eax fizd 2: 5am W? 4 the container an liquid. is drawn from theTOZABURO SUZUKI, OF SUNAMURA, JAPAN.

EVAPQBATOR.

Specification of Letters Iiatent.

Patented July 28, 1908.

Application flied Kay 15, 1907. Serial No. 373,835.

To all whom it may concern:

Beit known that I, TOZABURO SUZUKI, a subject of the Emperor of Japan,residing at No. 401 Jibeishinden, ,Sunamura, in the county ofMinami-Katsushika, in the Province of Tokyo, in the Empire of J a an,have invented certain new and useful In rovements in Evaporators, ofwhich the. allowin is a full, clear, and exact description.

his invention relates to improvementsin evaporators and thepresentmvention consists generally in the provision of a steam orheating chamber provided with a plurality of tubes or the like adaptedto deliver the liquid to a superposed evaporating chamber.

The invention also includes'the provision of a container for the liquidto be evaporated which is located in a manner to communicate with saidtubes and is provided with means for forcing the liquid from saidcontainer through said tubes and into said evaporating chamber. in orderto rovide means for receiving that portion or the liquid which is notevaporated in its passa e through the tubes and evaporating cham er Idesirably provide an auxiliary evaporating chamber which is preferablyin heatinCgproximity to said steam compartment an esirably derives heattherefrom to assist in the evapcrating operation. Desirably the vaporresulting from the action of the auxiliar chamber is carried to anoutlet which may if desired be the outlet common to the main evaporatingchamber. in order tmprevent the auxiliary chamber from filling toorapidly the latter is referably connected with auxiliary chamber by theaction of the circulating means. l I

The invention will be more fully described in connection with theaccompanying drawing and will be more particularly pointed out andascertained in and by the appended claims.

Figure 1, is a vertical sectional view, partly in elevation, of an evaporator embodying the main features of my invention. Fig. 2, is asectional view on line 2-2 of Fig. 1.

Like numerals of reference designate similar parts throughout thedrawing.

As shown 1 designates a steam or heating compartment provided with aninlet 2 through which the steam or other heating a ent is fed iromasource of supply such as p1 e 3. a designates an outlet for the steam w'ch may communicate with the outer air or connected in any convenientmanner. A plurality of tubes 5 are arranged within said compartment 1and closed to the same in order to convey the liquid through and subjectthe same to the action of the heat agent without mixing the same.Located below the compartment 1 is a container 6 which is closed to thecompartment 1 but which communicates with the tubes 5. Said container isprovided with valve inlets and outlets 7 an 8 through which the liquidto be evaporated can be supplied and drawn ofi.

A main evaporating chamber 9 is located in receiving proximity to thetubes 5 and is preferably superposed upon and above the steamcompartment 1 by means of any suitable supporting structure. A deflector10 is located in the evaporating chamber 9 and in the path of the liquiddischarging from the tubes 5. immediately above the deflector 10 is adeflector 11 provided with an openin 12 which is desirably centrallydisposed an immediately above the deflector 10. The function of thedeflector 10 is to deflect the liquid downwardly after it rises to acertain point in the evaporating chamber and prevent it from escapingthrough the outlet of the evaporating chamber which will presently bedescribed. The deflector 10 engages the vapors given off by the liquidin its passage through the evaporating chamber and forces the samecentrally where said vapors pass through the opening 12. The deflector11 also forms a chamber 13 adapted to receive vapor discharged from theauxiliary chamber which will be hereinafter more fully described.Themain evaporating chamber 9 is rovided with an outlet 14 whichpreferab y discharges to a trap drum 15. Said drum comprises an outercasing 16 whichincloses the upper end of a discharge pipe 17 and isprovided with a deflector 18 w ich deflects the vapor downwardly in thedrum toward the bottom thereof on one side and permits it to rise on theother and seek the openend of the pipe 17. condensation resulting frompassage of the vapor through said drum will be collected by the bottomwall 19.

An auxiliary chamber 20 is preferably disposed in heating roximity tothe steam compartment 1 so t at the heat therefrom may serve to heat thecontents of said auxiliary chamber and in the present construction theheating of the contents of the auxiliary chamber 20 is vfacilitated byarranging the Any water of chamber 20 to surround the compartment 1. Theauxiliary chamber 20 is separated from the evaporating chamber 9 by awall or partition 21. The liquid deflected downwardly by the deflector10 is directed principally upon the artition 21 and in order toaccommodate tie unevaporated liquid I provide the partition 21 with oneor a series of opcnings 22 located preferably adjacent the compartment 1so that the liquid flowing through said openings will engage the wall ofthe steam compartment and will be subjected to the heating actionthereof in an effective manner. In cases where the steam compartment 1cannot effect a sufliciently rapid eva oration to meet the requirementsI desirably provide a lurality of pipes 23 preferably horizontal ydisposed and surrounding said steam compartments. The steam or otherheating agent is supplied to said pipes 23 preferably directly from thecompartment 1 and in the present invention the ends of the pipe 23terminate at a manifold 24 which communicates by means of extensions 25with compartment 1. An effective heating action could be obtained by themere presence of the pipes 23 within the chamber 20 but I desirablyincrease the efliciency of said pipes 23 by providing openings 22 in thepartition 21 located in such a manner as to discharge directly upon theipes 23.

ow of liquid through the openings 26 I desirably provide a flange orledge 27 upon the partition 21 which serves to arrest the liquidadjacent the openings 26 to insure a free flow therethrough. The vapordischarged from the auxiliary chamber 20 is conveyed to an outlet and asshown pipes or. tubes 28 are provided and extend from the partition 21toward and through the deflector 1 1 delivering to the chamber 1 3 fromwhence the vapors dis charge through outlet 14. A pipe 29 connects thelower wall 19 with the auxiliary chamber 20 so that water condensationcollecting in the drum 15 will not be allowed to accumulate but willbereturned and subjected to the action of the heating agent to effectcomplete evaporation. In order to maintain the water collecting in thechamber 20 at a relatively low level a connection is formed between theauxiliary chamber and the container (i -which connection as shown is inthe form of pipes 30 and 31. Means are provided referably in saidconnection for effecting circulation of the liquid to be evaporated suchcirculation including the raising or forcing of the liquid upwardlythrough said tubes 5 against the liquid deflector 10. In the presentconstruction such means con sists of a screw ropeller 32 mounted onshaft 33 operated by belt or other means through ulleys 34. At the outerend of W ich not only forms one of the bearings for In order to insure acontinuous.

pipe 31 t ere is provided a stufiing box 35 shaft 33 but also preventsescape of li uid. A bracket 36 mounted on pipe 31 carries a bearing 37for said shaft.

The operation is as follows: A vacuum is produced in compartment 1 bysuitable attachments to outlet 4 whereupon steam is admitted andcirculates about tubes 5. When the propeller 32 is started liquid iscaused to flow upwardly through tubes 5 in which it is subjected to theaction-of the steam or other heating agent and outwardly from said tubestoward and against the deflector 10 from which the liquid is directeddownwardly upon the partition 21. The vapor arising from the liquidpasses upwardly and outwardly as hereinbefore de scribed. Theunevaporated liquid falling on the partition 21 is conveyed to theauxiliary chamber 20 wherein it is subjected to an additionalapplication of heat servingto assist in the evaporating operation. Thatportion of the liquid which is not evaporated in the chamber 20 passesdownwardly through pi e 30 and is returned by said. ropeller 32 t roughthe course just descri ed.

I claim:

1. An evaporator comprising in combination, a heating compartment, aplurality of tubes extending therethrough and closed to saidcompartment, a main evaporating chamber in receiving proximity, to saidtubes, a container for the liquid to be evaporated communicating withsaid tubes, an auxiliary evaporating chamber surrounding saidcompartment and communicating with said container and evaporatingchamber, and mechanical means for effecting circulation of the liquidfrom said container through said tubes to said main evaporating chamberand from said auxiliary chamber to said container.

2. An evaporator comprising in combination, a heating compartment, aplurality of tubes extending therethrough and closed to saidcompartment, a main evaporating chamber in receiving proximity to saidtubes, an auxiliary evaporating chamber surrounding said compartment, aninclined wall provided with openings permitting passage of water fromsaid main evaporating cham er to said auxiliary chamber, a container forthe liquid to be evaporated communicating with said tubes, and means forforcing the liquid from said container through said tubes and into saidevaporating chamber and from said auxiliary chamber to said container.

3. An evaporator comprising in combination, a heating compartment, aplurality of tubes extending therethrough and closed to saidcompartment, a main evaporating chamber in receiving proximity to saidtubes, an auxiliary evaporating chamber surrounding said compartment, aninclined wall provided with openings permitting 130 passage of waterfrom said main evaporating chamber to said auxiliary chamber, acontainer for the li uid to be evaporated communicating Wit said tubes,means for forcing the liquid from said container through said tubes andinto said evaporating chamber and from said auxiliary chamber auxiliaryevaporating chamber surrounding a container for the liquid to beevaporated,

.sald

compartment, said auxiliary chamber receiving water directed downwardlyby said deflector, tubes leading from said auxiliary chamber to a pointabove said vapor deflector,

said main evaporating 5. An evaporator comprising in combmatamer throughand mechanical means for'forcing the liquid from said container throughsaid tubes into chamber.

tion, a heating compartment, a plurality of tubes extending therethroughand closed to said compartment, a main evaporating chamber in receivingproximity to; said tubes, an auxiliary evaporating chamber in heatingproximity to said compartment, a container for the liquid to pipes forsaid eating withsaid steam compartment.

In testimony whereof I affix my signature in presence of two witnesses.

TOZABURO SUZUKI. Witnesses:

A; A. VVILLIAMSON, H. F. HAWLEY.

be evaporated, means for forcing said liquid fromsaid con-- said tube,and a plurality, of auxiliary chamber communi-

